Why metoclopramide is contraindicated in pheochromocytoma?

Because it's: like a stress hormone. It displaces and pushes out the stress hormones that the pheochromocytoma stores giving a storm of stress hormones. It isn't the worst one.. Haldol and other anti-psychotics are very similar to metoclop. monoamine oxidase inhibitors some obscure blood pressure drugs, and antidepressants that all ncrease stress hormones and cocaine and meth are all probably worse.